<?php
session_start();
$_SESSION = array();
if (ini_get("session.use_cookies"))
 {
    $params = session_get_cookie_params();
    setcookie(session_name(), '', time() - 42000,
        $params["path"], $params["domain"],
        $params["secure"], $params["httponly"]
    );
}
session_destroy();
echo "<meta content='0;URL=index.php' http-equiv='REFRESH'> </meta>";
?>